On and after July 1, 1911, every water company engaged in the collecting, selling and distributing water, and every water company not engaged in operation, shall keep upon its books the accounts prescribed or defined in Schedule A so far as the said accounts are pertinent to the facts and circumstances of the said company. The term water company is used herein in the sense defined in the Public Service Commission Law.
Maryland. Public Service Commission, "Regulations prescribing a uniform system of accounts for water companies" (1911). State Publications. 50.